Feature: Allow description to be passed in when using variables CLI

[Zhenye-Na]

Notes

This PR closes: #34756

Testing

pre-commit run  --all-files

Check if all hooks apply to the repository.........................................Passed
Add TOC for Markdown and RST files.................................................Passed
Add license for all SQL files......................................................Passed
Add license for all RST files......................................................Passed
Add license for all CSS/JS/JSX/PUML/TS/TSX files...................................Passed
Add license for all JINJA template files...........................................Passed
Add license for all Shell files....................................................Passed
Add license for all Python files...................................................Passed
Add license for all XML files......................................................Passed
Add license for all Helm template files............................................Passed
Add license for all YAML files except Helm templates...............................Passed
Add license for all Markdown files.................................................Passed
Add license for all other files....................................................Passed
Run black (Python formatter).......................................................Passed
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ruff...............................................................................Passed
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No providers imports in core example DAGs..........................................Passed
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No relative imports................................................................Passed
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start_date not to be defined in default_args in example_dags.......................Passed
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Check default value of deferrable attribute........................................Passed
Run mypy for dev...................................................................Failed
- hook id: mypy-dev
- exit code: 1

The image ghcr.io/Zhenye-Na/airflow/main/ci/python3.8 is not available

[Zhenye-Na]

Having some issue with CI, resolving those issues now

[Zhenye-Na]

Fixed unit test errors

breeze testing tests --test-type CLI

tests/cli/test_cli_parser.py ....................................        [  9%]
tests/cli/commands/test_celery_command.py ..........                     [ 12%]
tests/cli/commands/test_cheat_sheet_command.py .                         [ 12%]
tests/cli/commands/test_config_command.py ..................             [ 17%]
tests/cli/commands/test_connection_command.py .......................... [ 24%]
.....................                                                    [ 29%]
tests/cli/commands/test_dag_command.py ................................. [ 38%]
..                                                                       [ 38%]
tests/cli/commands/test_dag_processor_command.py .                       [ 39%]
tests/cli/commands/test_db_command.py .................................. [ 48%]
.................................                                        [ 57%]
tests/cli/commands/test_info_command.py ............                     [ 60%]
tests/cli/commands/test_internal_api_command.py .......                  [ 62%]
tests/cli/commands/test_jobs_command.py ......                           [ 63%]
tests/cli/commands/test_kerberos_command.py ..                           [ 64%]
tests/cli/commands/test_kubernetes_command.py ..........                 [ 66%]
tests/cli/commands/test_legacy_commands.py ...                           [ 67%]
tests/cli/commands/test_plugins_command.py ...                           [ 68%]
tests/cli/commands/test_pool_command.py ...........                      [ 71%]
tests/cli/commands/test_rotate_fernet_key_command.py ..                  [ 71%]
tests/cli/commands/test_scheduler_command.py ..................          [ 76%]
tests/cli/commands/test_standalone_command.py ................           [ 80%]
tests/cli/commands/test_task_command.py ................................ [ 89%]
............                                                             [ 92%]
tests/cli/commands/test_triggerer_command.py .                           [ 92%]
tests/cli/commands/test_variable_command.py ...........                  [ 95%]
tests/cli/commands/test_version_command.py .                             [ 96%]
tests/cli/commands/test_webserver_command.py ...............             [100%]


All Warning errors can be found in the /files/warnings-CLI-postgres.txt file.
================= 377 passed, 52 warnings in 192.05s (0:03:12) =================
Number of warnings: 26 /files/warnings-CLI-postgres.txt

Will be publishing next revision in a bit

[Zhenye-Na]

Used Github UI to rebase the feature branch.